If you turn the pants inside out and observe the structure of the hand pocket from the reverse side, you will see there is a small extra part attached to the main body of the hand pocket, it's a small sub-storage area for small things like AisPods and they also count that part in the amount of pocket. This kind of design is what they call "DeepPocket System" and I was confused with the number of pockets too when I got my first pants from them.